Search results for "PET"
showing 10 items of 12749 documents
Shrinkage Bubbles: The C–O–H–S Magmatic Fluid System at San Cristóbal Volcano
2018
New analytical results for the composition of shrinkage bubbles (09-70 vol. %) in olivine-hosted (Fo <80%) primary melt inclusions (MIs) have been incorporated into a novel geochemical model for San Cristó bal volcano, Nicaragua. The vapour, liquid, and mineral components found inside shrinkage bubbles may represent relics of early C-O-H-S fluids exsolved from a magmatichydrothermal system. This conclusion is supported by high-resolution Raman microspectroscopy revealing: (1) gaseous CO2 (d=0·17-0·31 g/cm3 in 31 samples) coexisting with liquid H2O (in seven samples) at ambient temperature (<22°C) inside the shrinkage bubbles of naturally quenched inclusions; (2) several mineral phases (i.e.…
Charged particle multiplicity distributions in restricted rapidity intervals in Z0 hadronic decays.
1991
The multiplicity distributions of charged particles in restricted rapidity intervals in Z0 hadronic decays measured by the DELPHI detector are presented. The data reveal a shoulder structure, best visible for intervals of intermediate size, i.e. for rapidity limits around ±1.5. The whole set of distributions including the shoulder structure is reproduced by the Lund Parton Shower model. The structure is found to be due to important contributions from 3-and 4-jet events with a hard gluon jet. A different model, based on the concept of independently produced groups of particles, "clans", fluctuating both in number per event and particle content per clan, has also been used to analyse the pres…
METODI FISICO E BIOLOGICO DI IDENTIFICAZIONE DI ALIMENTI IRRADIATI CONTENENTI CELLULOSA ATTRAVERSO L'USO DELLA DNA COMET ASSAY E DELLE SPETTROSCOPIA …
2013
L'assistente alla comunicazione nella scuola è solo un mediatore linguistico? Problemi, specificità, formazione di una nuova figura professionale.
2009
In seguito all’applicazione della L.104/92 sull’integrazione dei soggetti in situazione di handicap, sono presenti nelle scuole italiane gli “assistenti alla comunicazione” per gli alunni sordi: si tratta di una nuova figura professionale che, all’interno dei servizi educativi, si propone di far da ponte tra sordi e udenti, in quanto esperto delle principali problematiche degli alunni sordi ed esperto nella LIS (Lingua dei Segni Italiana). Ma di che tipo di mediazione si tratta? Quali problemi solleva e quali riflessioni dal punto di vista pedagogico, sociale, linguistico e antropologico? Questi i principali ambiti di riflessione trattati all’interno dell’articolo, in termini problematici e…
COSA PASSA NEL CUORE DEI BAMBINI: EMOZIONI, EDUCAZIONE FAMILIARE E VITA BUONA
2012
I drivers del modello competitivo: investimenti, finanziamenti e rapporti con il sistema creditizio
2015
l presente capitolo intende mettere a fuoco i punti di forza ma soprattutto le debolezze che contrassegnano la struttura finanziaria, il rapporto con il sistema bancario e la politica degli investimenti delle imprese italiane. This chapter intends to focus on the strengths but above all the weaknesses that mark the financial structure, the relationship with the banking system and the investment policy of Italian companies.
LATE ROMAN COOKING WARES FROM NORA (SARDINIA): INTERIM ARCHAEOLOGICAL AND ARCHAEOMETRICAL STUDY.
2010
This contribution aims to present the interim results of an archaeological and archaeometric research on the cooking wares from the central quarter of Nora (Cagliari, Sardinia) where a team from the University of Milano identified several Late Roman residences. The morphological analysis of the different groups has put in evidence a low variation of the types except for their size. The archaeometrical data show that most of the analysed materials may correspond to a local or regional production (with certain degree of variation) of cooking wares widely used in Nora in the Late Roman Period. It is important to stress that petrographic analysis shows that the compositional characteristics of …
Refractory metal nuggets in different types of cosmic spherules
2014
Abstract Out of the three basic cosmic spherule types collected from the seafloor, RMNs (refractory metal nuggets) have been reported from I-type spherules commonly, rarely from S-type spherules and never from the G-type spherules. Nuggets in the I-type cosmic spherules have formed by melting and complete oxidation during atmospheric entry, whereas no clear understanding emerged so far regarding the formation of the rare nuggets in S-type spherules. We collected cosmic spherules by raking the deep seafloor with magnets, and carried out systematic and sequential grinding, polishing and electron microscopic investigations on 992 cosmic spherules to identify RMNs. Fifty-four nuggets (RMNs) are…